Include missing specs

Specs/FilterSpec.swift

@@ -0,0 +1,63 @@
+import Spectre
+import Stencil
+
+
+describe("template filters") {
+  let context = Context(dictionary: ["name": "Kyle"])
+
+  $0.it("allows you to register a custom filter") {
+    let template = Template(templateString: "{{ name|repeat }}")
+
+    let namespace = Namespace()
+    namespace.registerFilter("repeat") { value in
+      if let value = value as? String {
+        return "\(value) \(value)"
+      }
+
+      return nil
+    }
+
+    let result = try template.render(context, namespace: namespace)
+    try expect(result) == "Kyle Kyle"
+  }
+
+  $0.it("allows you to register a custom filter") {
+    let template = Template(templateString: "{{ name|repeat }}")
+    let namespace = Namespace()
+    namespace.registerFilter("repeat") { value in
+      throw TemplateSyntaxError("No Repeat")
+    }
+
+    try expect(try template.render(context, namespace: namespace)).toThrow(TemplateSyntaxError("No Repeat"))
+  }
+}
+
+
+describe("capitalize filter") {
+  let template = Template(templateString: "{{ name|capitalize }}")
+
+  $0.it("capitalizes a string") {
+    let result = try template.render(Context(dictionary: ["name": "kyle"]))
+    try expect(result) == "Kyle"
+  }
+}
+
+
+describe("uppercase filter") {
+  let template = Template(templateString: "{{ name|uppercase }}")
+
+  $0.it("transforms a string to be uppercase") {
+    let result = try template.render(Context(dictionary: ["name": "kyle"]))
+    try expect(result) == "KYLE"
+  }
+}
+
+
+describe("lowercase filter") {
+  let template = Template(templateString: "{{ name|lowercase }}")
+
+  $0.it("transforms a string to be lowercase") {
+    let result = try template.render(Context(dictionary: ["name": "Kyle"]))
+    try expect(result) == "kyle"
+  }
+}